Other features

Windows COM ports can now be accessed from the Windows Subsystem for Linux

Holding the power button for 7 seconds will now trigger a bugcheck on devices that don't use legacy ACPI power buttons

Hyper-V will now make automatic checkpoints so you can always revert

The policy to disable the lock screen is now available for Windows 10 Pro

UWPs will now show up individually in the Volume Mixer when they play sound

The Share UI now shows an option to copy a link if sharing a link

Selection controls are now shown when selecting text, objects or ink with pen

Pen selection can now be done with the barrel button

When services like OneDrive try to download an online file for offline use in an application, it will trigger a notifications where you can allow this

A pen can now be used to scroll in all apps

The Task Manager now has a new GPU performance page

Processes on the Processes-page in Task Manager are now grouped together

The Processes-page in Task Manager now shows a "GPU Engine" column

You can now convert Hyper-V machines to "vmcz"-files to share them

Virtual machine gallery has been added under Quick create in Hyper-V

Passwords can now be reset from the lockscreen

Pens can now select and drag objects when the barrel button is used in UWP apps

Improved performance for WDAG containers

And further

The "Background Moderated" column in Task Manager has been renamed "Power Throttling"

The Recovery Drive tool is now available under the Windows Administrative Tools folder

The "Trust this PC?"-notification has been replaced with "You got a message on your phone. Want to see phone messages on this PC too?"

WinHelp has been removed

Support for Emoji 5.0 has been added

A number of emojis have been redesigned

The SMB1 server component is no longer included by default on Home or Pro

SMB1 is no longer installed by default on Enterprise and Education

Computer Browser service has been removed

Snipping tool is now natively per-monitor DPI-aware

All image resources in Windows have been cleaned up to no longer include XMP metadata

The Game Mode icon in the Game bar has been updated

Improved performance for two-finger precision touchpad scrolling

The Windows Console has a new default color scheme

The Computer\HKLM\Software\Microsoft\HVSI\SuspendOnContainerClose-key has been added to allow users to optimize WDAG launch times during active browser by not suspending the WDAG container when the window is closed

Bahnschrift has been added as a new font, marking the first OpenType Variable Font in Windows

Windows 10 S is now fully supported in the Windows Insider Program

Windows will now report to be version 1709

And further

Unknown fixes and enhancements

10.0.16299.3008

2 Oct '17

No changelog yet

10.0.16299.3014

5 Oct '17

No changelog yet

10.0.16299.3018

6 Oct '176 Oct '17

No changelog yet

10.0.16299.3023

7 Oct '178 Oct '17

No changelog yet

10.0.16299.3027

9 Oct '17

No changelog yet

10.0.16299.3029

10 Oct '1710 Oct '1711 Oct '1711 Oct '17

No changelog yet

10.0.16299.19

13 Oct '1713 Oct '1717 Oct '17

Fixed issues

Fixes an issue where, after removing apps, they’re reinstalled on every restart, logoff, and login

Fixes an issue where localization of the error output from a JET database is broken. Only English error strings are reported